the obama administration says it has no plans to keep troops there unless afghan president hamid karzai requests them to stick around. the news comes days before president obama is set to meet with mr. karzai. is lance armstrong about to come clean about doping? he's given a tell-all interview to oprah winfrey. he's always denied it. the oprah show airs january 17. >>gretchen: here's a big mystery. one day he was jumping for joy, the winner of a one million-dollar lottery prize. by the following month urooj khan was dead. now authorities believe his death was no accident, once classified as natural causes, cardiac, something or another. now it appears he was poisoned, a lethal dose of cyanide in his blood. did his winning lead to murder. they did not do an autopsy, 46 years old. why? >> i think it should have been done. a young person, 46, with no past history of any kind of illness, generally an autopsy would be done. they did draw blood and gave the body back to the family. the body is buried now and is going to be he can -- is going to be exhumed. the toxicologist didn'tor cyani. whe